DC-10842 is a component requirement of the North American manufacturer and is unusual in that the same number also appears under the name of the former transatlantic group of which the company was once part, which is a reminder of how corporate history survives in engineering documents. When the group was divided, the standards it had issued were inherited by both successors, and a number written for the combined organisation continued to be cited in drawings and specifications on both sides of the Atlantic for years afterwards. A supplier meeting such a number should establish which of the two companies now maintains it and which revision is current, because the two successors have since revised their inherited documents independently and the requirements may have diverged. The pair of entries on this site records both designations.